OFDM communication apparatus and propagation path estimation method
US6801586B1 · kind B1 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 30, 2000 |
| Grant date | Oct 5, 2004 |
| Priority date | — |
| Expiry date | Aug 1, 2022 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04L27/2647
- WIPO fieldDigital communication
- WIPO sectorElectrical engineering
Abstract
An OFDM communication apparatus may include a receiver that receives an OFDM signal in which a known signal and an information signal, following the known signal, are superimposed upon a plurality of subcarriers. A calculator of this apparatus calculates a propagation path estimated value using: (i) the known signal and the received version of the known signal or (ii) the received information signal and a recoded signal. A propagation path distortion compensator compensates the propagation path distortion of the received information signal, using the propagation path estimated value, to produce a distortion compensated signal. An error corrector error corrects the distortion compensated signal to produce an error corrected signal, and a recoder recodes the error corrected signal to produce the recoded signal. The calculator further calculates a correction value for updating the propagation path estimated value using the recoded signal and the received information signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.